Interlocking dead bolt lock and strike

ABSTRACT

An interlocking dead bolt lock and strike assembly having a lock housing enclosing a rotatable actuator for a lock bolt reciprocable between a retracted and a dead-locked position, an idler cooperating with the actuator for a key-operated lock actuation, and an extension on the housing acting to enclose the strike and cover the lock bolt in its projected dead-locked position. The housing may also include a reciprocable flag indicating when the bolt is projected, and an interior tumbler lock mounted on the housing which, when turned to one position allows the bolt to be operated by an exterior tumbler lock, and when rotated to a position 180* therefrom, prevents the exterior tumbler lock from operating the lock bolt.

United States Patent 1191 Orr NOV. 27, 1973 [54] E E EE DEAD BOLT LOCKAND FOREIGN PATENTS OR APPLICATIONS 14,480 4/1912 Great Britain 292/ 140[75] Inventor: John L. Orr, Rockford, Ill. 636,763 2/1962 Canada 70/432[73] Assignee: Keystone Consolidated Industries,

Inc Peoria [IL Primary ExamznerMarv1n A. Champ1on AssistantExaminer-Lawrence J. Staab Flled: June 1971 Attorney-A. W. Molinare etal.

[21] Appl. No.: 149,714

[57] ABSTRACT [52] US. Cl 70/104, 70/ 131, 70/432, An interlocking deadbolt lock and strike assembly g 292/ 169.14 having a lock housingenclosing a rotatable actuator [51] Int. Cl. E05b 63/00, E05b 65/06 fora lock bolt reciprocable between a retracted and a [58] Field of Search70/ 104, 129, 131, dead-locked position, an idler cooperating with theac- 70/ 134, 142, 147, 152, 153, 432, 438; tuator for a key-operatedlock actuation, and an ex- 292/ 140, 169 165, 182, 169.14, 169.17tension on the housing acting to enclose the strike and I 1 cover thelock bolt in its projected dead-locked posi- [56] References Cited tion.The housing may also include a reciprocable flag UNITED STATES PATENTSindicating when the bolt is projected, and an interior 1,280,993 10/1918Hammer 70 104 tumbler lock f f the housing which when 309 181 12/l884woodrich at 70/l34 turned to one position allows the bolt to be operated3,623:344 11 1971 Wartian 70/134 y an exterior tumbler lock, and whenrotated to a P 1,177,152 3/.1916 Teich 70/438 sition therefrom, preventsthe exterior tumbler 308,885 12/1884 Eames et al. 292/182 lock fromoperating the lock bolt. 963,632 7 1910 Nefllen et al.... 70 1341,482,298 1/1924 Greenison 70 134 18 Chums, 35 Drewmg Flgul'es I 1 I I g.46 I 59 H11 1 I I Y\ 1 i, H I v i x l w 1 1 1 1 61 -Ll 76 1 l 2 \l-: 4T #8 7' m 0 1 A l v/ J/O/ 4,20,, 93 l y F I I ag I l I i 66 '1 Q 0 t4561 I I l l V a I I INTERLOCKING DEAD BOLT LOCK AND STRIKE The presentinvention relates to a novel interlocking dead bolt lock and strikeassembly, and more particularly to a lock assembly having a lock housingwith an extension to cover the strike and projected lock bolt, as wellas a system involving both an interior and an exterior tumbler lock.

With the present alarming increase in robberies, theft and breaking andentering into business buildings, stores and homes, the problems ofsecurity have emerged as a national concern, thus increasing interest insecurity locks of the dead bolt and anti-picking types. In numerousinstallations, a dead bolt lock is uti lized along with a normal locksetincorporated in the door knob for an exterior entrancedoor or closure.Such a dead bolt lock is normally actuated by an interior knob or anexterior tumbler lock, and the lock usually has an interior slide buttonor lever to block movement of and dead lock the lock bolt topreventactuation from the exterior. However, many of these locks havelock bolts which can be retracted from the exterior by an unauthorizedperson using a thin metal or plastic sheet or plate which engages theinclined camming surface of the lock bolt through the opening betweenthe door and the frame. The present invention provides a novel lockstructure that prevents unauthorized retraction of the lock bolt and/orunauthorized operation of the exterior tumbler lock.

Among the objects of the present invention is the provision of a noveldead bolt lock assembly having an interlocking strike member. The strikemember includes a plate secured to the door frame and a hasp receivingthe outer end of the bolt when projected to its dead locked position.The lock housing has a cover extension beyond the end of the housingthrough which the bolt extends to enclose the strike hasp and form aninterlocking assembly. 7

Another object of the present invention is the provision of a novel.dead boltlock assembly having a reciprocable lock bolt movable betweena retracted and a dead-locked position. A rotatable actuator operatesthe lock bolt and is positively retained in either of the two boltpositions by detent means cooperating with the lock housing. Theactuator positively engages the lock bolt so as to prevent forcibleunauthorized retracting of the lock bolt by pressure at the exposed endof the bolt. An idler also cooperates with the actuator to providerotation thereof upon operation of an exterior tumbler lock.

A further object of the present invention is the provision of a noveldead bolt lock assembly having a reciprocable flag in the lock housingoperated by rotation of the actuator to project the flag when the lockbolt is advanced and thus provide a visual indication .that the bolt isin its dead-locked position.

The present invention also comprehends the provision of a novel deadbolt lock assembly having an interior tumbler lock cooperating with theactuator and idler and having two plug positions spaced by an arc of180. In one plug position, the interior lock allows actuation of thelock bolt by the exterior tumbler lock while, in the other plugposition, the tumbler lock prevents actuation of the bolt by theexterior lock.

The present invention further comprehends the provision of a novel deadbolt lock assembly with an interior tumbler lock acting to blockexterior actuation of the lock bolt where the tumbler lock includes arotatable plug having a keyway and pin tumblers therein and a lockcylinder having two sets of drivers and springs spaced apart to providefor two actuation positions of the lock plug.

Further objects are to provide a construction of maximum simplicity,efficiency, economy and ease of assembly and operation, and such furtherobjects, advantages and capabilities as will later more fully appear andare inherently possessed thereby.

In the drawings:

FIG. 1 is a perspective view of the interlocking dead bolt lock andstrike.

FIG. 2 is a rear elevational view of the lock assembly.

FIG. 3 is a cross sectional view of the lock assembly taken on the line33 of FIG. 1.

FIG. 4 is a rear elevational view of the lock assembly with the rearplate removed and the strike hasp shown in cross section.

FIG. 5 is a view similar to FIG. 4 but with the parts rotated to projectthe bolt to dead-locked position.

FIG. 6 is a rear elevational view of the lock housing.

FIG. 7 is a partial vertical cross sectional view taken on the line 77of FIG. 6.

FIG. 8 is a front elevational view of the rotatable actuator.

FIG. 9 is a vertical cross sectional view of the actuator taken on theline 99 of FIG. 8.

FIG. 10 is a rear elevational view of the reciprocable lock bolt.

FIG. 11 is a top plan view of the lock bolt.

FIG. 12 is a perspective view of a second embodiment of lock assemblyhaving an indicator flag cooperating with the actuator.

' FIG. 13 is a rear elevational view of the lock assembly of FIG. 12with the back plate removed and showing the bolt in retracted position.

FIG. 14 is a view similar to FIG. 13 but with the bolt and flag inprojected position.

FIG. 15 is a front elevational view of the actuator showing the tabs foractuation of the flag.

FIG. 16 is a horizontal cross sectional view taken on the line l6-l6 ofclaim 15.

FIG. 17 is a rear elevational view of the flag.

FIG. 18 is a side elevational view of the flag taken from the right-handside of FIG. 17.

FIG. 19 is a rear elevational view of the lock bolt for this embodiment.

FIG. 20 is a horizontal cross sectional view taken on the line 20-20 ofFIG. 19.

FIG. 21 is a partial front elevational view of a third embodiment of thelock assembly with an interior tumbler lock replacing the rotatableknob.

FIG. 22 is an enlarged exploded perspective view showing a portion ofthe housing and the interior tumbler lock, the shifter and the actuator.

FIG. 23 is a rear elevational view of the interior tumbler lock.

FIG. 24 is a top plan view of the interior lock of FIG. 23 and showingthe shifter in dotted outline.

FIG. 25 is a front elevational view of the bolt, the flag and theactuator, with the shifter shown in vertical cross section, and showingthe position of the shifter and the actuator to block movement of theactuator with the bolt in dead-locked position.

FIG. 26 is a view similar to FIG. 25, but showing the position of theshifter and the actuator to block movement of the actuator with the boltretracted.

FIG. 27 is a horizontal cross sectional view taken through the lock ofFIGS. 25 and 26 assembled onto door. I

FIG. 28 is a horizontal cross sectional view taken through the interiorlock.

FIG. 29 is a front elevational view of the actuator.

FIG. 30 is a vertical cross sectional view of the actuator taken on theline 3030 of FIG. 29.

FIG. 31 is a top plan view of the shifter.

FIG. 32 is a view similar to FIG. 31 with the shifter rotated 90.

FIG. 33 is a front elevational view of the shifter.

FIG. 34 is a rear elevational view of the shifter.

FIG. 35 is a vertical cross sectional view of the shifter taken on theline 35-35 of FIG. 34.

Referring more particularly to the disclosure in the drawings whereinare shown illustrative embodiments of the present invention, FIG. 1discloses a dead bolt lock assembly and strike 11 to be secured to thedoor and frame, respectively, of an entrance or passageway to lock thedoor against entry by unauthorized persons. The strike 1 1 includes anL-shaped strike plate 12 with openings 13 in both flanges 14 and 15 tosuitably secure the plate to the door frame (not shown). A U-shapedstrike hasp 16 is staked to one flange 15 so as to extend inwardly fromthe frame and provide a passage or opening 17 to receive a bolt of thelock assembly.

The lock assembly 10 includes a lock housing 18 with a front or exteriorwall 29, side walls 21,21, anouter end wall 22 and an inner end wall 23having an opening 24 for a reciprocable lock bolt. The housing 18 isprovided with an extension 25 beyond the end wall 23 having a front wall26, side walls 27,27 and an end wall 28; the extension being open at therear side at 29 to fit over and receive the strike hasp 16 therein. Aremovable rear wall or base 31 fits within a recess 32 in the housing tocover the rear open side of the housing 18 and enclose the lockcomponents. The housing 18 is adapted to be secured to the interiorsurface ofa door (not shown) by conventional securing means throughopenings 33 in the housing 18 and in the rear wall 31.

The front wall 19 has an opening 34 (FIG. 7) therethrough providing aninwardly extending annular flange 35.acting as a bearing surface. A knob36 (FIGS. 1 and 3) with an enlarged flange 37 adjacent the wall 19 ofthe housing 18 is provided with a bearing surface 38 and an inwardlyextending cylindrical portion 39 adapted to be headed at 41 to besecured to a rotatable actuator 42. The actuator (see FIGS. 8 and 9) hasa circular opening 43 receiving the portion 39 of the knob and iscounterbored at 44 to receive the headed end 41. The actuator 42 isprovided with a pair of substantially diametrically oppositely extendingarms 45 and 46, with the arm 45 recessed at 47 to receive the inner endof a detent 48 (FIGS. 4 and 5) biased outwardly by a compression spring49 positioned in the recess.

The detent 48 has a recess 51 in the inner end .to receive one end ofthe spring 49 therein and the outer end 52 of the detent is rounded. Theouter end .wall22 of the housing 18 has an arcuate inner surface 53provided with a pair of detent recesses 54 and 55 at the ends of thesurface 53 spaced apart by an arc of approximately 90; each recessadapted to receivev the rounded end 52 of the detent 48 to provide the.limits of rotation of the actuator 42.

The opposite arm 46 terminates in a curved forward actuating surface 56,with the arm extending rearwardly, as seen in FIG. 4, to a narrowretracting end surface 57; the surfaces cooperating with a dead bolt 68.The actuator also has an enlarged arcuate recess 58 formed in one faceextending over an arc of slightly greater than 90 with end surfaces orshoulders 59,59 limiting movement of the idler 61. As seen in FIGS. 3and 4, the idler 61 has a generally cylindrical body with one end 62received in the counterbore 44 and the opposite end 63 received in anopening 64 in the rear wall 31. A radially extending partial flange 65on the idler 61 has a radial car 66 received in the arcuate recess 58 toprovide both for lost motion of the idler relative to the actuator 42and to actuate the actuator by an exterior key-operated tumbler lock,such as shown in FIG.

' 27. The idler is provided with a slot or cross-shaped opening 67therethrough to receive the tailpiece conventionally used on a tumblerlock.

A dead bolt 68 (see FIGS. 4, 5, l0 and 11) is reciprocably mounted inthe housing 18 and has a locking body 69 terminating at the rear end ina lateral arm 71 having an offset rearward extension 72 received in anelongated guide recess 73 (FIG. 6) formed in the interior surface of thefront wall 19. The extension has a recess 74 providing a rear retractingsurface 75, an inclined camming surface 76 and a vertical lockingsurface 77 are formed at the rear edge of the bolt body 68.

Now considering the operation of the lock, the lock assembly 10 issecured onto the interior surface of a door and the strike 11 is securedonto the interior surface and edge of the door frame; the door having aconventional knob which may include a locking arrangement in the knobassembly. As seen in FIG. 1, with the dead bolt retracted, the door maybe freely opened and closed and the extension 25 receives the strikehasp 16 therein to completely enclose the hasp when the door is closed.

FIG. 4 discloses the position of the lock when the dead bolt 68 isretracted into the housing 18. The actuator 42 is rotated with thedetent 48 received in the lower recess 54 to retain the dead bolt inretracted position. The bolt 68 is projected to its deadlocked position,shown in FIG. 5 by manually rotating the knob 36, which simultaneouslyrotates the actuator 42 in a clockwise direction so that the actuatingarm 46 and actuating surface 56 engage the inclined camming surface 76to cam the bolt 68 to its projected position shown in FIG. 5. In thisposition, the detent 48 is received in the recess 55 to yieldablyprevent rotation of the actuator 42, and the curved surface 56 on thearm 46 is positioned behind the vertical rear surface 77 of the boltwith the arm 46 being in an over-center position to deadlock the bolt inits projected position with the bolt body 69 received in the opening 17defined by the strike hasp 16.

To retract the bolt 68, the knob and actuator are rotated in acounterclockwise direction, as shown by the arrow in FIG. 5, withinitial rotation moving the surface 56 from behind the vertical boltsurface 77. Then the retracting end surface 57 engages the retractingsurface on the bolt 68 to cam the bolt rearwardly, as guided by therearward extension 72 in the elongated slot 73 in the housing 18, untilthe parts reach the position shown in FIG. 4.

, A key-actuated tumbler lock, such as shown in FIG.

v2 7, on the exterior of the door can also actuate the bolt the door andinto the slot 67 in the idler 61. The recess 58with its end walls 59,59in the retractor 42 allows approximately 90 of lost motion for the idler61 relative to the actuator 42 to return the key to its inactiveposition in the tumbler lock after actuation of the bolt in eitherdirection.

The idler 61 is shown in its normal position in FIG. 4, and clockwiserotation of the idler by actuation of the tumbler lock causes the radialear 66 to engage the adjacent wall 59 of the recess 58 to rotate theactuator 42 and project the bolt 68 to the position of FIG. 5; afterwhich the idler 61 can be rotated in the opposite direction for 90, tothe idlerposition-shown in FIG. 5 due to the lost motion arrangement, toreturn the key to a vertical position in the tumbler lock so the key canbe removed therefrom. Rotation of the idler 61 in a counterclockwisedirection from the position of FIG. 5 retracts the bolt to the positionof FIG. 4.

FIGS. 12 through 20 disclose a second embodiment of the presentinvention having a lock assembly with a housing 18 and extension 25", alock bolt 68, an actuator 42", an idler 61, and a strike having a hasp16; with these parts being substantially identical to those shown in thefirst embodiment and carrying the same reference numerals as theembodiment of FIGS. 1 through 11 with the addition of a superscript a.

The difference in this embodiment is the addition of a flag 78, clearlyshown in FIGS. 17 and 18; the flag eral arm 82, and a curved uprightflange 83 on the body 79 and the arm 82; the flange terminating in adownturned end 84. The body 79 has an upper narrow end 85 defined by ashoulder 86 having a laterally projecting tab 87 thereon.

The housing 18 is provided with the opening 88 receiving the dependingflag end 81 and a generally vertically aligned channel 89 perpendicularto and intersecting the guide slot 73. The actuator 42", as seen inFIGS. 15 and 16, is modified by the addition of a radially extending ear91 spaced from the arm 46 and an annular extension 92 on the front wall19 of the housing 18, which has a pair of arcuately spaced radial tabs93 and 94. The tab 93 is generally aligned behind the ear 91, and thetab 94 is generally aligned with the rear edge of the arm 46. The detenthas been replaced by a detent ball 48" biased by the detent spring 49.

The actuator 42 also has a counterbore 95 formed in the rear surface(see FIG. 16) to receive the idler 61, and the idler 61" has an enlargedflange 65 extending over an arc of approximately 180 with thecylindrical end 63 extending therefrom. The flange 65 has the radial ear66 integral therewith, and the counterbore 95 aids in defining the axisof rotation for the idler 61 along with the opening in the back plate(not shown).

Considering the operation of the lock with the flag 78 therein, FIG. 13discloses the lock with the bolt 68" and flag 78 in their retractedpositions. Rotation of theactuator 42 by either the knob 36 or the idler61 in a clockwise direction causes the arm 46 on the actuator 42 toengage the inclined surface 76 of the bolt 68 and cam the bolt towardsits projected position. As the actuator is rotated, the flag 78 willeither drop by gravity or the car 91 acting on the flange 83 on thelateral arm 82 and the tab 94 acting on the shoulder 86 cams the flag78' to project the depending end 81 from the opening 88 inthe housingand provide a visual indication that the bolt is in its dead-lockedposition, as seen in FIG. 14. With both the bolt 68 and the flag 78projected, the tab 94 on the actuator 42" engages the shoulder 86 on theflag 78 to prevent retraction thereof unless the bolt is actuated toretracted position.

To retract the bolt and the flag, the actuator 42 is rotated in thecounterclockwise direction so that the arm 46 engages the retractingsurface to cam the bolt inwardly. After an initial rotation ofapproximately 60, the tab 93 behind the ear 92 engages the lateral tab87 to retract the flag into the housing until the parts again reach theposition of FIG. 13.

FIGS. 21 through 35 disclose a third embodiment of a lock assembly 10where the knob on the exterior of the housing 18" is replaced with anovel tumbler lock 96 suitably secured to the front wall 19". Within thelock housing 18 are the actuator 42", the lock bolt 68", the flag 78 andthe idler 61"; all of these parts, with the exception of the' actuatorbeing identical to those shown in the second embodiment of lock.

The actuator 42", as shown in FIGS. 25 and 26, has the oppositelyextending arms 45" and 46", a detent ball biased by a compression springas shown in FIGS. 13 and 14, a radial ear 91, an annular extension 92"with the radial tabs 93" and 94", and the counterbore 95 in the rearface thereof. Within the extension is a radially inwardly extending stop97 positioned intermediate the spaced tabs 93" and 94 and generallyaligned with the forward edge of the arm 46". This stop 97 cooperateswith a shifter 98 actuated by the tumbler lock 96.

The tumbler lock 96 differs from conventional keyoperated pin tumblerlocks in providing two sets of spring-biased drivers 123 on oppositesides of the cylinder body 99, which cylinder body is generally squarewith diametrically oppositely extending driver housings 101 and 102. Thecylinder body 99 partially extends into an opening 103 in the wall 19"having axially extending grooves 104 to receive and position the cornersof the cylinder body in the housing. A generally rectangular cover 105has a recess 106 generally conformably receiving the cylinder 99therein, and a pair of threaded openings 107,107 in the rear wall of thecover are aligned with openings 108,108 in the wall 19" to receivesuitable securing means, such as the screws 109,109, to secure the lock96 onto the housing.

The cover 105 has a central opening 1 1 1 to rotatably receive theenlarged face 113 of a lock plug 1 12 (FIGS. 22, 23 and 24), whichextends through a generally cylindrical passage 114 in the cylinder body99 with the inner end 115 projecting beyond the cylinder into theopening 103. The rotary plug 112 has an axially extending keyway 116 toreceive a suitable key (not shown), and a plurality of lateral passages188 intersect the keyway 116 and receive suitable tumbler pins 119. The

, cylinder body 99 has two sets of passages 121,122 in the housings 101and 102 to receive two identical sets of drivers 123 biased inwardly bycompression springs 124.

The inner end 115 of the plug has an axial groove 125 (FIGS. 23, 28)formed in the exterior surface generally opposite the keyway toconformably receive a rib 126 on the shifter 98. The shifter, as seen inFIGS. 31-35 has a generally cylindrical body 127 with an enlargedcylindrical end 128 separated by a radial flange 129. A

cylindrical passage 131 extends axially through the shifter, with theenlarged end 128 being counterbored at 132 to receive the inner end 115of the rotary plug 112. The radially inwardly extending longitudinal rib126 is formed in the counterbore 132. Also, a radially extending ear 133is formed on the cylindrical body 127 with the outer end of the earbeing flush with the periphery of the radial flange 129 andlongitudinally aligned with the rib 126.

With the lock 96 secured to the housing 18 and the shifter 98 positionedwith its rib 126 in the groove 125 in the plug for simultaneousrotation, the actuator 42 is placed over the shifter 98 with the annularextension 92 receiving the cylindrical body 127 and the radial flange129 thereof. The stop 97 in the actuator will now cooperate with the ear133 on the shifter as will next be described.

In operation, the idler 61 actuated by the tumbler lock 134 andtailpiece 135 mounted in a door 137 operates the actuator 42" throughthe cooperation of the radial ear 66 and the shoulders 59" in the samemanner as in the previous embodiments. As seen in FIGS. 21 and 22 thecover 105 has the inscription YES generally aligned with the driverhousing 101 and the inscription NO generally aligned with the driverhousing 102, and the plug 112 has an arrow 136 inscribed thereondiametrically opposite the open edge of the keyway l 16. Theinscriptions refer to whether the tumbler lock 134 and the idler 61 areblocked from actuating the actuator 42" and the lock bolt 68".

As seen in FIG. 26, the stop 97 in the actuator is normally positionedadjacent the rear edge 77 of the lock bolt 68 when the lock bolt isretracted but slightly above the center line XX horizontally through thehousing 18". With the rotary plug 112 rotated so the arrow 136 isopposite the NO inscription, the ear 133 on the shifter is generallyaligned with the horizontal axis XX of the lock and positioned below thestop 97. With the arrow pointing to YES, the ear 133 is positioned 180from the above mentioned position away from the stop and to the left asviewed in FIGS. 25 and 26.

Insertion of a proper key into the keyway 116 will raise the tumblerpins 119 so that the plane of abutment of the tumbler pins 119 and theassociated set of drivers 123 will coincide with the shear line betweenthe periphery of the plug 112 and the cylindrical surface of the passage114 in the cylinder 99 to allow simultaneous rotation of the plug 112and the shifter 98. Whether the plug is in the YES or NO position, theplug is rotated in a counterclockwise direction as seen in FIG. 26, sothat the ear 133 is moved around to engage the upper edge of the stop 97and rotate the shifter 98 to project the lock bolt 68" to its deadlocked position previously described (FIG. 25).

When the bolt is in its projected position and the flag 78" is projectedfrom the housing 18, the plug 112 is in the position with the arrow 136pointing to NO, the ear 133 is positioned toward the bolt on the axisXX, and the stop 97 is below the axis XX and below and abutting the ear133 (FIG. 25). If the key is then removed to lock the plug in thedescribed position, the tumbler lock 134 (FIG. 27) can rotate the idler61" until it engages a shoulder 59", but the interaction of the stop 97with the now immovable ear 133 prevents the idler 61 from rotating theactuator 42 to retract the bolt 68".

Rather than leaving the plug 1 12 with the arrow 136 pointing to NO, thekey may rotate the plug 112 in the opposite direction for to the YESposition without affecting the position of the actuator or bolt wherethe ear 133 will be generally opposite the stop 97. Removing the keyretains the plug in this position and, as the stop 97 is now spaced fromthe ear 133, rotation of the idler 61 will now cause rotation of theactuator 42 to retract the lock bolt 68 to its unlocked position.

With the bolt 68 in its projected dead locked position, rotation of thekey, plug 112, and shifter 97 in the clockwise direction brings the ear133 around underneath the stop 97 and, abutting the stop, causesrotation of the actuator 42" and retraction of the lock bolt 68 to theposition of FIG. 26. The final position of the shifter 98 has the ear133 adjacent the rear surface 77" of the bolt 68 with the stop 97thereabove and the arrow 136 pointing to the NO inscription. Withdrawalof the key retains the plug 1 12 in the NO position so the exteriortumbler lock 134 cannot rotate the actuator 42" through the idler 61".Insertion of the key and rotation of the plug 112 to the YES positionremoves the ear 133 from abutment with the stop 97 and allows actuationof the actuator 42" by the exterior tumbler lock after removal of thekey.

Thus, this third embodiment of lock provides a key actuation of the lockbolt by either an interior or an exterior tumbler lock, with theinterior lock 96 providing a blocking position which will blockactuation of the bolt by the exterior tumbler lock 134. The stop on theactuator and the ear on the shifter are so dimensioned in arcuate extentto provide for the actuation and positioning as above described.

I claim:

1. A dead-locking lock assembly for a door hingedly mounted in a doorframe therefor, comprising a housing secured to the interior surface ofthe door adjacent the free edge thereof and having an opening in an endwall adjacent the free edge, a strike mounted on the door frame edge andhaving a passage therein, a lock bolt mounted in said housing forreciprocable movement between a retracted position and a projectedposition where the bolt partially extends through said opening into thepassage in the strike, a camming surface on the rear edge of the bolt,an actuator having a camming arm cooperating with the bolt cammingsurface and a detent arm with detent means cooperating with an end wallsurface of said housing opposite the wall facing the strike, said endwall surface including an arcuate interior surface with recesses thereinto receive said detent means and maintain said bolt in at least aretracted or a projected position, said means to rotate the actuator toactuate the bolt, said camming arm being in an over-center position whenthe bolt is projected to deadlock the bolt in a projected position.

2. A dead-locking lock assembly as set forth in claim 1, including anextension of the housing at the end thereof having the opening for thebolt to cover the projected end of the bolt and the exposed position ofthe strike.

3. A dead-locking lock assembly as set forth in claim 2, in which saidstrike includes an L-shaped strike plate secured to two adjacentsurfaces of the door frame and a strike hasp secured to the interiorportion of the plate and forming the passage to receive the bolt.

4. A dead-locking lock assembly as set forth in claim 1, in which saidrotating means is a knob mounted on the exterior of the housing andhaving an inwardly extending portion secured to said actuator.

5. A dead-locking lock assembly as set forth in claim 1, in which theend wall arcuate interior surface terminates at each end in a recess toreceive the detent means in either of the two bolt positions.

6 A dead-locking lock assembly as set forth in claim 1, including anidler rotatably received in said housing and an ear on said idler, saidactuator having an arcuate recess therein cooperatin with the ear toallow limited lost motion of the idler relative to said actuator.

7. A dead-locking lock assembly as set forth in claim 1, including areciprocable flag mounted in said housing and having a depending visualindicating end, said housing having an opening in a side wall throughwhich the indicating end projects when the bolt is in deadlockedposition.

8. A dead-lockinglock assembly as set forth in claim 7, in which saidflag and said actuator have cooperating means to reciprocate. said flagbetween the projected and retracted positions.

9. A dead-locking lock assembly as set forth in claim 8, in which saidcooperating means includes a lateral ear on the flag adjacent one endand a lateral arm adjacent the indicating end to limit outward movementof the flag, and arcuately spaced tabs on the actuator cooperating withthe lateral ear on the flag to reciprocate said flag between projectedand retracted positions.

10. A dead-locking lock assembly as set forth in claim 9, including anupstanding flange on said flag body and the lateral arm; and a cammingear on the actuator adapted to cooperate with the flange to cam the flagto projected position.

11. A dead-locking lock assembly as set forth in claim 1, including akey-actuated interior tumbler lock, a rotary plug in said tumbler lock,a rotary shifter mounted in said housing and operatively connected tothe plug, and means on said shifter and actuator to rotate the actuatorand project or retract the bolt upon rotation of the plug by a properkey.

12. A dead-locking lock assembly as set forth in claim 1, including akey-actuated interior tumbler lock mounted on the exterior surface ofsaid housing, a rotary plug in said tumbler lock, a rotary shiftermounted in said housing and operatively connected to said plug, an earon the shifter and a stop on the actuator cooperating to rotate theactuator and project or retract the bolt upon rotation of the of theplug by a proper key.

13. A dead-locking lock assembly as set forth in claim 12, in which theear is formed on the outer periphery of the shifter, and said actuatorhas a recess receiving the shifter and ear, and the stop is formed onthe inner periphery of the recess.

14. A dead-locking lock assembly as set forth in claim 13, in whichtumbler pins are positioned in said plug,.a lock cylinder receiving saidplug and having two sets of oppositely disposed pin passages, a set ofresiliently-biased drive pins for each set of passages so that the plugcan be rotated to and the key removed at two oppositely disposedpositions.

15. A dead-locking lock assembly as set forth in claim 14, in which oneposition of key removal positions the ear on the shifter adjacent to andabutting the stop on the actuator to prevent rotation of the actuatorand, in the other position, the shifter ear is removed approximatelyfrom engagement with the actuator stop to allow rotation of theactuator, and second means to rotate the actuator when not blocked bythe shifter ear.

16. A dead-locking lock assembly as set forth in claim 14, in which saidsecond means includes an idler cooperating with said actuator forlimited lost motion of the idler relative to the actuator and to rotatethe actuator, and exterior lock means operatively connected to saididler to rotate the same.

17. A dead-locking lock assembly for a door hingedly mounted in a doorframe therefor, comprising a housing secured to the interior surface ofthe door adjacent the free edge thereof and having an opening in an endwall adjacent the free edge, a strike mounted on the door frame edge andhaving a passage therein, a lock bolt mounted in said housing forreciprocable move ment between a retracted position and a projectedposition where the bolt partially extends through said opening into thepassage in the strike, a camming surface on the rear edge of the bolt,an actuator having a detent arm and a camming arm cooperating with thebolt, detent means in the detent arm cooperating with said housing tohold the actuator and bolt in either the retracted or the projectedposition, means to rotate the actuator to actuate the bolt, said cammingarm being in an over-center position when the bolt is projected todeadlock the bolt in projected position, and reciprocal flag meansmounted in said housing, said flag means having a depending visualindicating end, said housing including an opening through which saidvisual end projects whenever said bolt is in the deadlock position, saidactuator including cooperating means to reciprocate said flag betweenthe projected and retracted position.

18. A dead-locking lock assembly for a door hingedly mounted in a doorframe therefor, comprising a housing secured to the interior surface ofthe door adjacent the free edge thereof and having an opening in an endwall adjacent the free edge, a strike mounted on the door frame edge andhaving a passage therein, a lock bolt mounted in said housing forreciprocable movement between a retracted position and a projectedposition where the bolt partially extends through said opening into thepassage in the strike, a camming surface on the rear edge of the bolt,an actuator having a detent arm and a camming arm cooperating with thebolt, detent means in the detent arm cooperating with said housing tohold the actuator and bolt in either the retracted or the projectedposition, means to rotate the actuator to actuate the bolt, said cammingarm being in an over-center position when the bolt is projected todeadlock the bolt in projected position, and key actuated interiortumbler lock means mounted on the exterior surface of said housing witha rotary plug in said tumbler lock means, a rotary shifter mounted onsaid housing and operatively connected to said plug, an ear on theshifter and a stop on the actuator cooperating to rotate the actuatorand project or retract the bolt upon rotation of the plug by a properkey, said ear being formed on the outer periphery of the shifter, andsaid actuator having a recess receiving the shifter and ear, the stopbeing formed on the inner periphery of the re-

1. A dead-locking lock assembly for a door hingedly mounted in a doorframe therefor, comprising a housing secured to the interior surface ofthe door adjacent the free edge thereof and having an opening in an endwall adjacent the free edge, a strike mounted on the door frame edge andhaving a passage therein, a lock bolt mounted in said housing forreciprocable movement between a retracted position and a projectedposition where the bolt partially extends through said opening into thepassage in the strike, a camming surface on the rear edge of the bolt,an actuator having a camming arm cooperating with the bolt cammingsurface and a detent arm with detent means cooperating with an end wallsurface of said housing opposite the wall facing the strike, said endwall surface including an arcuate interior surface with recesses thereinto receive said detent means and maintain said bolt in at least aretracted or a projected position, said means to rotate the actuator toactuate the bolt, said camming arm being in an over-center position whenthe bolt is projected to deadlock the bolt in a projected position.
 2. Adead-locking lock assembly as set forth in claim 1, including anextension of the housing at the end thereof having the opening for thebolt to cover the projected end of the bolt and the exposed position ofthe strike.
 3. A dead-locking lock assembly as set forth in claim 2, inwhich said strike includes an L-shaped strike plate secured to twoadjacent surfaces of the door frame and a strike hasp secured to theinterior portion of the plate and forming the passage to receive thebolt.
 4. A dead-locking lock assembly as set forth in claim 1, in whichsaid rotating means is a knob mounted on the exterior of the housing andhaving an inwardly extending portion secured to said actuator.
 5. Adead-locking lock assembly as set forth in claim 1, in which the endwall arcuate interior surface terminates at each end in a recess toreceive the detent means in either of the two bolt positions.
 6. Adead-locking lock assembly as set forth in claim 1, including an idlerrotatably received in said housing and an ear on said idler, saidactuator having an arcuate recess therein cooperatin with the ear toallow limited lost motion of the idler relative to said actuator.
 7. Adead-locking lock assembly as set forth in claim 1, including areciprocable flag mounted in said housing and having a depending visualindicating end, said housing having an opening in a side wall throughwhich the indicating end projects when the bolt is in dead-lockedposition.
 8. A dead-locking lock assembly as set forth in claim 7, inwhich said flag and said actuator have cooperating means to reciprocatesaid flag between the projected and retracted positions.
 9. Adead-locking lock assembly as set forth in claim 8, in which saidcooperating means includes a lateral ear on the flag adjacent one endand a lateral arm adjacent the indicating end to limit outward movementof the flag, and arcuately spaced tabs on the actuator cooperating withthe lateral ear on the flag to reciprocate said flag between projectedand retracted positions.
 10. A dead-locking lock assembly as set forthin claim 9, including an upstanding flange on said flag body and thelateral arm, and a camming ear on the actuator adapted to cooperate withthe flange to cam the flag to projected position.
 11. A dead-lockinglock assembly as set forth in claim 1, including a key-actuated interiortumbler lock, a rotary plug in said tumbler lock, a rotary shiftermounted in said housing and operatively connected to the plug, and meanson said shifter and actuator to rotate the actuator and project orretract the bolt upon rotation of the plug by a proper key.
 12. Adead-locking lock assembly as set forth in claim 1, including akey-actuated interior tumbler lOck mounted on the exterior surface ofsaid housing, a rotary plug in said tumbler lock, a rotary shiftermounted in said housing and operatively connected to said plug, an earon the shifter and a stop on the actuator cooperating to rotate theactuator and project or retract the bolt upon rotation of the of theplug by a proper key.
 13. A dead-locking lock assembly as set forth inclaim 12, in which the ear is formed on the outer periphery of theshifter, and said actuator has a recess receiving the shifter and ear,and the stop is formed on the inner periphery of the recess.
 14. Adead-locking lock assembly as set forth in claim 13, in which tumblerpins are positioned in said plug, a lock cylinder receiving said plugand having two sets of oppositely disposed pin passages, a set ofresiliently-biased drive pins for each set of passages so that the plugcan be rotated to and the key removed at two oppositely disposedpositions.
 15. A dead-locking lock assembly as set forth in claim 14, inwhich one position of key removal positions the ear on the shifteradjacent to and abutting the stop on the actuator to prevent rotation ofthe actuator and, in the other position, the shifter ear is removedapproximately 180* from engagement with the actuator stop to allowrotation of the actuator, and second means to rotate the actuator whennot blocked by the shifter ear.
 16. A dead-locking lock assembly as setforth in claim 14, in which said second means includes an idlercooperating with said actuator for limited lost motion of the idlerrelative to the actuator and to rotate the actuator, and exterior lockmeans operatively connected to said idler to rotate the same.
 17. Adead-locking lock assembly for a door hingedly mounted in a door frametherefor, comprising a housing secured to the interior surface of thedoor adjacent the free edge thereof and having an opening in an end walladjacent the free edge, a strike mounted on the door frame edge andhaving a passage therein, a lock bolt mounted in said housing forreciprocable movement between a retracted position and a projectedposition where the bolt partially extends through said opening into thepassage in the strike, a camming surface on the rear edge of the bolt,an actuator having a detent arm and a camming arm cooperating with thebolt, detent means in the detent arm cooperating with said housing tohold the actuator and bolt in either the retracted or the projectedposition, means to rotate the actuator to actuate the bolt, said cammingarm being in an over-center position when the bolt is projected todeadlock the bolt in projected position, and reciprocal flag meansmounted in said housing, said flag means having a depending visualindicating end, said housing including an opening through which saidvisual end projects whenever said bolt is in the deadlock position, saidactuator including cooperating means to reciprocate said flag betweenthe projected and retracted position.
 18. A dead-locking lock assemblyfor a door hingedly mounted in a door frame therefor, comprising ahousing secured to the interior surface of the door adjacent the freeedge thereof and having an opening in an end wall adjacent the freeedge, a strike mounted on the door frame edge and having a passagetherein, a lock bolt mounted in said housing for reciprocable movementbetween a retracted position and a projected position where the boltpartially extends through said opening into the passage in the strike, acamming surface on the rear edge of the bolt, an actuator having adetent arm and a camming arm cooperating with the bolt, detent means inthe detent arm cooperating with said housing to hold the actuator andbolt in either the retracted or the projected position, means to rotatethe actuator to actuate the bolt, said camming arm being in anover-center position when the bolt is projected to deadlock the bolt inprojected position, and key actuated interior tumbler lock means mountedon the exterior surface of Said housing with a rotary plug in saidtumbler lock means, a rotary shifter mounted on said housing andoperatively connected to said plug, an ear on the shifter and a stop onthe actuator cooperating to rotate the actuator and project or retractthe bolt upon rotation of the plug by a proper key, said ear beingformed on the outer periphery of the shifter, and said actuator having arecess receiving the shifter and ear, the stop being formed on the innerperiphery of the recess.